CHARGING AND STARTING – K SERIES ..................................................... 4

Roof On Switch (3 Door Vehicles Only)

The roof on switch (C0497) is located on the RH 'D' post, and is provided a constant battery feed by fuse 14 of the passenger compartment fuse box (C0583) on a P wire. The roof on switch is closed when the hard back is fitted, or the soft back is in the fitted position. In this instance, current flows across the switch (C0497) to the CCU (C0428) on a PY wire.

If the hard back is removed (or the soft back is folded down) the roof on switch becomes open circuit, and the feed to the CCU is removed. By monitoring the state of the roof on switch, the CCU can determine if the roof has been opened illegally and sound the alarm if necessary.

Anti-theft Alarm LED

Fuse 14 of the passenger compartment fuse box (C0589) provides a constant battery feed to the anti-theft alarm LED mounted in the instrument pack (C0230) on a P wire. The earth path for the LED (C0235) is controlled by the CCU (C0592) on a UK wire. By switching the earth path on and off, the CCU can control the flashing sequence of the LED.

Inertia Switch

Fuse 10 of the engine compartment fuse box (C0575) provides a constant battery feed to the inertia switch (C0123) on a G wire. The inertia switch is a normally closed switch. On K1.8 and KV6 vehicles, the inertia switch (C0123) is connected to the CCU (C0428) via the engine compartment fuse box by a GU then UG wire. On Td5 vehicles the inertia switch (C0123) is connected to the CCU (C0428) by a GU wire.

When the inertia switch is tripped the switch opens, cutting the voltage supply to the CCU. Sensing this, the CCU unlocks all doors and cuts the electrical supply to the fuel pump. NOTE: The CCU will only unlock all doors if the ignition is switched on, and the anti-theft alarm isn't armed.

For more information on the fuel pump, refer to the relevant Charging and Starting section of this manual. + CHARGING AND STARTING – Td4. + CHARGING AND STARTING – K SERIES. + CHARGING AND STARTING – KV6.

Volumetric Sensor

The CCU (C0429) provides a feed to the volumetric sensor (C0358 on 3 door vehicles, C1896 on 5 door vehicles) on a WB wire. When the alarm is armed, the volumetric sensor (C0358 on 3 door vehicles, C1896 on 5 door vehicles) returns a signal feed back to the CCU (C0428) on an NB wire. If the sensor detects movement within the vehicle, it withdraws the signal feed to the CCU. Sensing this, the CCU will sound the alarm.

The CCU (C0429) also provides a gain setting signal to the volumetric sensor (C0358 on 3 door vehicles, C1896 on 5 door vehicles) on an SW wire. This enables the volumetric sensor to determine if it is looking at the interior of a 3 door vehicle or a 5 door vehicle and adjust its sensitivity accordingly.

The volumetric sensor (C0358 on 3 door vehicles, C1896 on 5 door vehicles) is earthed on a B wire.

Radio Frequency (RF) Receiver

The CCU (C0429) provides a feed to the RF receiver (C0359) on a Y wire. The RF receiver (C0359) provides a 12 V feed back to the CCU (C0428) on an S wire. When an RF signal is received from the remote handset, the receiver switches the feed back to the CCU between 12 V and 0 V at high frequency.

The RF receiver (C0359) is earthed on a B wire.

Master Lock Switch

The master lock switch is a non-latching rocker switch mounted on the centre console, below the radio. When the bottom (lock) half of the switch is pressed, current is able to flow from the CCU (C0428) to the master lock switch (C0328) on a BN wire. Current flows across the closed switch contacts to earth on a B wire. The CCU will now lock all the doors. NOTE: The alarm will not be armed when using the master lock switch.

When the top (unlock) half of the switch is pressed, current is able to flow from the CCU (C0428) to the master lock switch (C0328) on a BK wire. Current flows across the closed switch contacts to earth on a B wire. The CCU will now unlock all the doors.

Door Lock Motors

When the CCU receives a request to lock or unlock the doors, it powers the door lock motors as follows:

Driver Door

To lock the driver door, the CCU (C0430) provides a feed to the driver door lock motor (C0441) on a K wire. The motor (C0441) is provided an earth path via the CCU (C0430) on an O wire. This enables the motor to drive the latch to the lock position.

To unlock the driver door, the CCU (C0430) provides a feed to the driver door lock motor (C0441) on an O wire. The motor (C0441) is provided an earth path via the CCU (C0430) on a K wire. This enables the motor to drive the latch to the unlock position.

Passenger Door

To lock the passenger door, the CCU (C0430) provides a feed to the passenger door lock motor (C0441) on a K wire. The motor (C0441) is provided an earth path via the CCU (C0430) on an O wire. This enables the motor to drive the latch to the lock position.

To unlock the passenger door, the CCU (C0430) provides a feed to the passenger door lock motor (C0441) on an O wire. The motor (C0441) is provided an earth path via the CCU (C0430) on a K wire. This enables the motor to drive the latch to the unlock position. NOTE: The driver and passenger door lock motors have the same connector numbers as they utilise the same harness.

LH Rear Door

To lock the LH rear door, the CCU (C0430) provides a feed to the LH rear door lock motor (C0442) on a K wire. The motor (C0442) is provided an earth path via the CCU (C0430) on an O wire. This enables the motor to drive the latch to the lock position.

To unlock the LH rear door, the CCU (C0430) provides a feed to the LH rear door lock motor (C0442) on an O wire. The motor (C0442) is provided an earth path via the CCU (C0430) on a K wire. This enables the motor to drive the latch to the unlock position.

RH Rear Door

To lock the RH rear door, the CCU (C0430) provides a feed to the RH rear door lock motor (C0442) on a K wire. The motor (C0442) is provided an earth path via the CCU (C0430) on an O wire. This enables the motor to drive the latch to the lock position.

To unlock the RH rear door, the CCU (C0430) provides a feed to the RH rear door lock motor (C0442) on an O wire. The motor (C0442) is provided an earth path via the CCU (C0430) on a K wire. This enables the motor to drive the latch to the unlock position. NOTE: The LH rear and RH rear door lock motors have the same connector numbers as they utilise the same harness.

Tail Door

Operation of the tail door latch mechanism is only possible when the vehicle is stationary or travelling at speeds lower than 3 mph (5 km/h). To allow the tail door latch to operate, the CCU (C0430) provides a single voltage pulse to the tail door motor (C0617) on a PU wire. The motor (C0617) is earthed on a B wire.

The CCU receives a road speed signal from the ABS ECU. If road speed rises above 3 mph (5 km/h), the CCU will not provide a voltage pulse to the tail door motor, inhibiting operation of the tail door latch mechanism.